FreeNAS 8.3.0 is based on FreeBSD 8.3 with version 28 of the ZFS
filesystem. This is a major milestone in FreeNAS development, bringing
in the plugin system with ZFS version 28. Development of the FreeNAS 8.2
branch has come to a halt, as both ZFS version 15 as well as FreeBSD 8.2
are no longer supported.

There have been no major changes between 8.3.0-RC1 and RELEASE, mostly
bugfixes and minor usability improvements to the GUI. See the
release notes for a complete list: